Remediation of Diesel-Contaminated Soils Using Persulfate Under Alkaline Condition

Liang, Chenju; Guo, Yi-Yu

doi:10.1007/s11270-012-1221-6

Cited by 55 publications

(28 citation statements)

References 23 publications

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“…(3)) by adding ferrous salts or zerovalent iron (Eq. (4)) (Chen et al, 2015;Killian et al, 2007;Peluffo et al, 2015), by heat or light activation, by peroxide activation (Zhao et al, 2013), or more recently by alkaline activation (Deng et al, 2014;Liang and Guo, 2012;Liang and Lei, 2015). In addition, during PS activation, sulfate radicals and hydroxyl radicals (E = 2.70 V) may coexist, as shown in Eqs.…”

Section: Introductionmentioning

confidence: 99%

Fate of iron and polycyclic aromatic hydrocarbons during the remediation of a contaminated soil using iron-activated persulfate: A column study

Pardo

Santos

Salvador

2016

Science of The Total Environment

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Section: Introductionmentioning

confidence: 99%

Fate of iron and polycyclic aromatic hydrocarbons during the remediation of a contaminated soil using iron-activated persulfate: A column study

Pardo

Santos

Salvador

2016

Science of The Total Environment

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“…In general, persulfate activation refers to the use of energy or specific reagents to cause generation of the sulfate radical (SO 4 •− ) and/or hydroxyl radical (HO •− ) in sufficient quantities for contaminant degradation. Common persulfate activation methods include heating (Lee et al, 2012; Liang, et al, 2003; Liang and Bruell, 2008; Ghauch et al, 2012; Johnson et al, 2008), UV irradiation, ultrasonication (Wang and Liang, 2014), electrochemical activation (Yuan and Liao, 2014), transition metal amendment (Liang and Lee, 2008; Liang et al, 2004; Buxton et al, 1997), and base activation (Furman et al, 2010; Liang et al, 2007; Liang and Guo, 2012). Heat, base, and ferrous iron activation are the methods that are currently used for field ISCO applications (Block et al, 2004).…”

Section: Introductionmentioning

confidence: 99%

In-situ activation of persulfate by iron filings and degradation of 1,4-dioxane

et al. 2015

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Activation of persulfate by iron filings and subsequent degradation of 1,4-dioxane (dioxane) was studied in both batch-reactor and column systems to evaluate the potential of a persulfate-enhanced permeable reactive barrier (PRB) system for combined oxidative-reductive removal of organic contaminants from groundwater. In batch experiments, decomposition of persulfate to sulfate and degradation of dioxane both occurred rapidly in the presence of iron filings. Conversely, dioxane degradation by persulfate was considerably slower in the absence of iron filings. For the column experiments, decomposition and retardation of persulfate was observed for transport in the columns packed with iron filings, whereas no decomposition or retardation was observed for transport in columns packed with a reference quartz sand. Both sulfate production and dioxane degradation were observed for the iron-filings columns, but not for the sand column. The pH of the column effluent increased temporarily before persulfate breakthrough, and significant increases in both ferrous and ferric iron coincided with persulfate breakthrough. Multiple species of free radicals were produced from persulfate activation as determined by electron paramagnetic resonance (EPR) spectroscopy. The impact of the oxidation process on solution composition and iron-filings surface chemistry was examined using ICP-MS, SEM-EDS, and XRD analyses. A two-stage reaction mechanism is proposed to describe the oxidation process, consisting of a first stage of rapid, solution-based, radical-driven, decomposition of dioxane and a second stage governed by rate-limited surface reaction. The results of this study show successful persulfate activation using iron filings, and the potential to apply an enhanced PRB method for improving in-situ removal of organic contaminants from groundwater.

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“…In activated persulphate oxidation, the highly reactive radicals (mainly sulphate radicals) are produced with the application of different activation aids such as heat, transition metals or alkali, and hydrogen peroxide. [20] Persulphate activation by alkali and the use of ethylene diamine tetracetic acid (EDTA) to promote the availability of Fe 2+ and other transition metals in the solution are occasionally applied for the remediation of contaminated soil, [21,22] given their benefits. Upon activation, the efficiency of contaminant decomposition may be increased many times over.…”

Section: Introductionmentioning

confidence: 99%

Column experiment on activation aids and biosurfactant application to the persulphate treatment of chlorophene-contaminated soil

Bolobajev

Oncu

Viisimaa

et al. 2014

Environmental Technology

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An innovative strategy integrating the use of biosurfactant (BS) and persulphate activated by chelated iron for the decontamination of soil from an emerging pollutant chlorophene was studied in laboratory down-flow columns along with other persulphate activation aids including combined application of persulphate and hydrogen peroxide, and persulphate activation with sodium hydroxide. Although BS addition improved chlorophene removal by the persulphate treatment, the addition of chelated iron did not have a significant influence. Combined application of persulphate with hydrogen peroxide resulted in a significant (p≤.05) overall improvement of chlorophene removal compared with treatment with persulphate only. The highest removal rate (71%) of chlorophene was achieved with the base-activated persulphate, but only in the upper part (of 0.0-3.5 cm in depth) of the column. The chemicals at the applied dosages did not substantially influence the Daphnia magna toxicity of the effluent. Dehydrogenase activity (DHA) measurements indicated no substantial changes in the microbial activity during the persulphate treatment. The highest oxygen consumption and a slight increase in DHA were observed with the BS addition. The combined application of persulphate and BS at natural soil pH is a promising method for chlorophene-contaminated soil remediation. Hydroquinone was identified among the by-products of chlorophene degradation.

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Remediation of Diesel-Contaminated Soils Using Persulfate Under Alkaline Condition

Cited by 55 publications

References 23 publications

Fate of iron and polycyclic aromatic hydrocarbons during the remediation of a contaminated soil using iron-activated persulfate: A column study

Fate of iron and polycyclic aromatic hydrocarbons during the remediation of a contaminated soil using iron-activated persulfate: A column study

In-situ activation of persulfate by iron filings and degradation of 1,4-dioxane

Column experiment on activation aids and biosurfactant application to the persulphate treatment of chlorophene-contaminated soil

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